Oil-well pump



Aug. 20, 1929.

J. c. VROMAN 1,725,496

OIL WELL PUMP Filed D90. 27, 1927 rf l 2 i ,l- I

7** I Il #d w19 .N v3 ,11 l f j I 2;"7 l Il wvl/Z give y/ I l /"r ll 4 lnumlfoz cfCWoman 25 struction.

Patented Aug. 20, 1929.

UNITED STATES PATENT OFFICE.

JOHN C. VROMAN, OF CHELSEA, OKLAHOMA, ASSIGNOR OF ONE-HALF T JOHN' R. 1

KETCHUM, OF CHELSEA, OKLAHOMA, ONE-FOURTH TO C. A. BICKLEY, ONE-EIGHTH T0 MABEL GOODMAN, AND `ON'E-IlIL'si-H'13H TO JOE BICKLEY.

OIL-WELL PUMP.

Application filed December 27, 1927. Serial No. 242,740.

o terfering with the flow of the liquid. The

invention is illustrated in the accompanying drawing and willbe hereinafter' fully set forth.

In the drawing: Figure 1 Vis an elevation of the pump plunger in' position within the working barrel;

Figure 2 isa vertical longitudinal section of the same;

Fig. 3 is a section on the line 3-3 of Fig.

2, and

Fig. 4 is a section on the line 4-4 of Fig` 2.

In the drawing, the reference Ynumeral 1 indicates a portion of a working barrel which may be of ther usual orv Vany preferred con- Within this working barrel is disposed a plunger comprising a lower member 2 which is equipped with a working valve 3 and operating over the usual standing valve (not shown) This plunger member is tubular and carries a central outlet tube 4 which a fiat-sided turning tool may be engaged and,

below its upper extremity, the tube is formed with an external annularshoulder 6. The upper member 7 ofthe plunger is slidably mounted upon the tube 4 and its upper eX- tremity is internallvthreaded Vto receive a stud S'to which the lower end of the usual sucker rod is attached. Vertically extending grooves 9 are formed in the upper portion of the member 7 and, through their upper portions, slots 10 are formed in the bottoms of the grooves so that communication is established between the working barrel and the space between the stud 8 and the tube 4 to permit escape of the liquid raised bv the action of the plunger. The upper portion of the plunger member 7 fits closely but slidably around the upper end of the tube 4 and has an internal annular shoulder 11 opposed to the shoulder 6 so that there may be some lost motion between the two sect-ions of the plunger, and the bore of the member 7 is enlarged in its lower portion to define a reservoir or retaining chamber 12 communicating at its top with the grooves 9 through openings 13. It will be understood that, when the sucker rod moves upwardly, the upper plunger member will move therewith and this movement will be free of the tube 4 until the upper shoulder 11 impinges against the shoulder 6, whereupon the tube 4 and the lower plunger member 2 will move with the rod. Resting upon the upper end of the lower plunger member 2 is packing consisting of an annular body 14 of some compressible material impregnated with small balls,

or pellets 15 of a compressible material or composition which maybe easily compressed during the operation of the pump. Outlet openings 16 are formed through the bottom of the retainer chamber 12 so that the packing pellets may readily fiow to the space below the same and come to rest upon the packer body 14. The slots 10 should be of such width that, while they will permit a ready outlet of the raised liquid, they will prevent the passage of the packing therethrough to the interior of the tube and in order to deflect the packing, if any elements thereof should tend to enter the slots, the lower ends of the slots are beveled, as shown, whereby the packing elements will be deflected outwardly into the grooves. t

.The pump is operated in the usual manner so that upon the up stroke of the plunger any liquid which may have passed the valve 3 will react upon the valve soy as to press it to its seat and the body ,of liquid above the valve will then be raised through the working barrel with the plunger. On the down stroke of the plunger, the pressure of the liquid below the valve 3 will unseat the same and the liquid will then .flow out through the slots 10 and the grooves 9 to rise withintheworkingbarrel.

The packing elements may be fed into the working barrel at the outlet head and will gravitate through the barrel to the plunger, and will then enter the grooves 9 and be directed by the same through the openings 13 to accumulate in the retainer chamber 12 and this chamber may be illed before the pump is lowered in the well. Of course, the packing will not remain in the retainer if the space below the same is clear but will at once pass press the same and seal the joint between the plunger and the barrel. Then the plunger is withdrawn from the barrel as may be necessary at times, the packing, of course, will be withdrawn with it and any packing which may still be within the retainer will be held therein as the plunger is drawn to the surface, inasmuch as the tendency of the pellets to crowd the opening 16 will choke the escape except when the pellets are j-arred by impact of the upper plunger member upon the lower member. By providing the retainer 12,

vI am enabled to establish an initial supply of packing which will automatically gravitate y through the openings 16 as the packing bellow the retainer is compressed or worn so that the pump will be properly sealed against leakage automatically and may beoperated through a long period of time without the packing being given any attention. The construction is exceedingly simple and the parts may be readily assembled while the cost of production will be slight and the cost of maintenance of the packingwill be negligble. The parts may be readily disassembled if repairs shouldv be necessary. After raising the plunger to the mouth oi' the well, the stud 8 is removed, whereupon a flat blade is inserted and engaged in the notches 5.' Turning the blade will obviously withdraw the tube 4 from the lower plunger member 2 and result in complete separation of the members 2 -and 7. The pellets may readily gravitate through the grooves 9 and are easily compressed while the body 14 serves as a retarder to prevent escape of the pellets around the lower plunger member. As additional pellets pass from the retainer chamber, they will be compressed so as to be intimately united with the body 14.

Having thus described the invention, I claim:

1. The combination of a lower plunger member, a liquid delivery tube attached to and rising from the plunger member, an upper plungerl member slidably fitted around the liquid delivery tube and constructed with outlet slots in its upper portion andbeing further provided in its upper portion with vertically extending grooves through which packing may gravitate, and a packing retainver carried by the upper member and provided in its lower end with outlet openings to permit packing to pass to the lower plunger member, the upper plunger member and the retainer having lost motion upon the liquid delivery tube to effect compression of the|` packing between the retainer and the lower plunger member.

2. The combination of a lower plunger member, a liquid delivery tube rising from` -said plunger member, an upper plunger member slidably fitted upon the tube, a packing retainer carried by the upper member, said member having an endportion opposed to an annular shoulder on the tube adjacent the upper end thereof whereby a limited lost molower plunger member by turning movement an upper plunger member fitted about said tube and having outlet ,openings in its wall above the tube, and an attaching stud engaged in the open upper end of the upper plunger member and removable upwardly therethrough to permit engagement of a turning tool with the notches in the upper end of the liquid delivery tube. Y Y

In testimony whereof I aix my signature.

JOHN o. vRoMAN. [1.. 5.] 

